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CVE

CVE-2026-23988

Rufus has Local Privilege Escalation via TOCTOU Race Condition in Fido Script Handling
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CVE

CVE-2026-23988

Rufus has Local Privilege Escalation via TOCTOU Race Condition in Fido Script Handling

Rufus is a utility that helps format and create bootable USB flash drives. Versions 4.11 and below contain a race condition (TOCTOU) in src/net.c during the creation, validation, and execution of the Fido PowerShell script. Since Rufus runs with elevated privileges (Administrator) but writes the script to the %TEMP% directory (writeable by standard users) without locking the file, a local attacker can replace the legitimate script with a malicious one between the file write operation and the execution step. This allows arbitrary code execution with Administrator privileges. This issue has been fixed in version 4.12_BETA.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.3
-
3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23988.json, https://github.com/pbatard/rufus/commit/460cc5768aa45be07941b9e4ebc9bee02d282873, https://github.com/pbatard/rufus/releases/tag/v4.12_BETA, https://github.com/pbatard/rufus/security/advisories/GHSA-hcx5-hrhj-xhq9, https://nvd.nist.gov/vuln/detail/CVE-2026-23988

Severity

7.3

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.3
EPSS Probability
0.00011%
EPSS Percentile
0.01392%
Introduced Version
0
Fix Available
460cc5768aa45be07941b9e4ebc9bee02d282873

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